Merge tag 'v6.14-rc4' into next

Sync up with the mainline.

1 files changed, 19 insertions, 1 deletions

diff --git a/samples/rust/rust_print_main.rs b/samples/rust/rust_print_main.rs
index aed90a6feecf..7e8af5f176a3 100644
--- a/samples/rust/rust_print_main.rs
+++ b/samples/rust/rust_print_main.rs
@@ -34,6 +34,24 @@ fn arc_print() -> Result {
     // Uses `dbg` to print, will move `c` (for temporary debugging purposes).
     dbg!(c);
 
+    {
+        // `Arc` can be used to delegate dynamic dispatch and the following is an example.
+        // Both `i32` and `&str` implement `Display`. This enables us to express a unified
+        // behaviour, contract or protocol on both `i32` and `&str` into a single `Arc` of
+        // type `Arc<dyn Display>`.
+
+        use core::fmt::Display;
+        fn arc_dyn_print(arc: &Arc<dyn Display>) {
+            pr_info!("Arc<dyn Display> says {arc}");
+        }
+
+        let a_i32_display: Arc<dyn Display> = Arc::new(42i32, GFP_KERNEL)?;
+        let a_str_display: Arc<dyn Display> = a.clone();
+
+        arc_dyn_print(&a_i32_display);
+        arc_dyn_print(&a_str_display);
+    }
+
     // Pretty-prints the debug formatting with lower-case hexadecimal integers.
     pr_info!("{:#x?}", a);
 
@@ -83,7 +101,7 @@ impl Drop for RustPrint {
 }
 
 mod trace {
-    use core::ffi::c_int;
+    use kernel::ffi::c_int;
 
     kernel::declare_trace! {
         /// # Safety